CN217085469U - Straight following formula backlight unit of stable in structure - Google Patents

Abstract

The utility model discloses a straight down type backlight module with stable structure, which comprises a back plate, a light-emitting component, a supporting frame, a light-scattering component and a fixing frame, wherein the light-emitting component is fixed at the bottom of the inner side of the back plate; the supporting frame is arranged on the periphery of the inner side of the back plate and is arranged on the outer side of the light-emitting component; the light scattering component is supported on the supporting frame; the fixing frame is fixed on the back plate and presses and fixes the supporting frame and the light scattering assembly in the back plate. The utility model discloses a luminous homogeneity of backlight unit is good with visual effect, also can guarantee that backlight unit's light source can not receive the pushing down of astigmatism subassembly and damage.

Description

Straight following formula backlight unit of stable in structure

Technical Field

The utility model relates to a backlight technical field, concretely relates to stable in structure's straight following formula backlight unit.

Background

The backlight module is a structure for providing backlight source for display devices such as liquid crystal displays and the like which can not independently emit light, and the displays can display pictures with rich colors only by white light provided by the backlight module. The backlight module comprises a direct type backlight module and a side type backlight module, and the direct type backlight module is widely applied to display parts such as vehicle-mounted displays, television and computer displays due to the advantages of stable structure, low cost and the like.

Straight following formula backlight unit includes the pointolite of equipartition and backlight unit bottom and the astigmatism diffuser plate, the membrane of loosing light, the membrane of adding light that is located the pointolite top, and diffuser plate, the membrane of loosing light and the membrane of adding light have certain weight, need support in pointolite top, otherwise diffuser plate, the membrane of loosing light and the membrane of adding light couch under to the pointolite on, influence the luminous homogeneity of backlight unit, even couch damage light source down. Currently, a light diffusion plate, a light diffusion film and a light intensifying film above a point light source are generally supported by arranging support pillars inside a backlight module, but the support pillars are easy to generate lamp shadows to influence the uniformity of light emission of the backlight module.

SUMMERY OF THE UTILITY MODEL

The utility model provides a technical problem to on spreading plate, light diffusing film and the membrane meeting tata to the pointolite that expands backlight unit, influence the luminous homogeneity of backlight unit, tata damage power even down provides a stable in structure's that can solve straight following formula backlight unit.

In order to solve the technical problem, the technical scheme of the utility model is that: a straight down type backlight module with stable structure comprises a back plate, a light emitting component, a supporting frame, a light scattering component and a fixing frame, wherein the light emitting component is fixed at the bottom of the inner side of the back plate; the supporting frame is arranged on the periphery of the inner side of the back plate and is arranged on the outer side of the light-emitting component; the light scattering component is supported on the supporting frame; the fixing frame is fixed on the back plate and presses and fixes the supporting frame and the light scattering assembly in the back plate.

Furthermore, the top of the back plate is provided with a positioning groove, a first positioning lug is arranged on the outer side of the light scattering assembly, the first positioning lug is matched with the positioning groove, and the first positioning lug is arranged in the positioning groove.

Furthermore, a second positioning bump is arranged on the outer side of the supporting frame and matched with the positioning groove, the second positioning bump is installed in the positioning groove, and the first positioning bump is overlapped on the second positioning bump.

Furthermore, the fixing device also comprises fixing glue, and the first positioning lug is fixedly bonded on the back plate by the fixing glue.

Further, be provided with on the fixed frame inside wall and dodge the groove, dodge the groove setting in the first positioning lug and the second positioning lug outside, dodge the groove and can dodge first positioning lug and second positioning lug.

Furthermore, the four corners of the back plate are provided with notches, and the notches facilitate punching and forming of the back plate.

Further, the backplate outside is provided with the fixed block, be provided with the fixed orifices on the fixed frame lateral wall, the fixed block is with fixed orifices looks adaptation, the backplate passes through the block of fixed block and fixed orifices with fixed frame and is fixed together.

Furthermore, the light scattering assembly comprises a diffusion plate, a light scattering film and a light enhancement film, wherein the diffusion plate, the light scattering film and the light enhancement film are sequentially stacked on the supporting frame and are pressed and fixed in the back plate through the fixing frame; the outer sides of the diffusion plate, the light-diffusing film and the light-adding film are provided with first positioning lugs.

Further, the light shading film further comprises light shading glue, wherein the light shading glue is connected to the top of the light shading film in a bonding mode and is bonded between the light shading film and the fixing frame.

Further, light emitting component includes heat conduction double faced adhesive tape, lamp plate and reflective membrane, the lamp plate passes through the heat conduction double faced adhesive tape bonding to be fixed in the inboard bottom of backplate, the reflective membrane is fixed on the lamp plate, the light source on the lamp plate exposes from the reflective membrane.

The utility model discloses the beneficial effect who realizes mainly has following several: the backlight module is internally provided with a support frame for supporting the light scattering assembly consisting of the diffusion plate, the light scattering film, the light intensifying film and the like in the backlight module, so that the light scattering assembly consisting of the diffusion plate, the light scattering film, the light intensifying film and the like cannot fall onto a point light source, and the stability of the backlight module can be ensured; and the supporting frame is arranged around the inner side of the backlight module, so that a lamp shadow cannot be generated when the backlight module emits light, the uniformity and the visual effect of the light emitted by the backlight module are ensured, and the light source of the backlight module cannot be damaged due to the fact that the light source is pressed down by the light scattering component. The light scattering assembly composed of the diffusion plate, the light scattering film, the light intensifying film and the like is pressed and fixed on the back plate through the fixing frame, the light scattering assembly is further guaranteed not to fall down to a point light source of the backlight module, the light emitting uniformity of the backlight module and the light source of the backlight module are further guaranteed not to be damaged due to the fact that the light source is pressed down by the light scattering assembly, and the stability of the backlight module can be further guaranteed.

Drawings

Fig. 1 is an exploded schematic view of a structurally stable direct type backlight module according to an embodiment of the present invention;

fig. 2 is a schematic structural view of a first, second or third embodiment of the present invention when a fixed frame is not installed on a direct type backlight module with a stable structure;

fig. 3 is a schematic structural view of a supporting frame of a structurally stable direct type backlight module according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a back plate of a structurally stable direct type backlight module according to an embodiment of the present invention;

fig. 5 is a schematic structural view of an outer side of a fixing frame of a direct type backlight module with a stable structure according to an embodiment of the present invention;

fig. 6 is a schematic structural view of an inner side of a fixing frame of a direct type backlight module with a stable structure according to an embodiment of the present invention;

fig. 7 is a schematic structural view of a diffuser plate of a direct type backlight module with a stable structure according to a second embodiment of the present invention;

fig. 8 is a schematic structural view of a light diffusing film or a light intensifying film of a direct type backlight module with a stable structure according to a second embodiment of the present invention;

fig. 9 is an exploded schematic view illustrating an installation of a light emitting module and a back plate of a structurally stable direct type backlight module according to a third embodiment of the present invention;

fig. 10 is a schematic structural view illustrating a light emitting assembly of a structurally stable direct type backlight module according to a third embodiment of the present invention being mounted on a back plate.

The drawings are for illustrative purposes only and are not to be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted; the same or similar reference numerals correspond to the same or similar parts; the terms describing positional relationships in the drawings are for illustrative purposes only and are not to be construed as limiting the patent.

Detailed Description

To facilitate understanding for those skilled in the art, the present invention will be described in further detail with reference to the accompanying drawings and examples.

Example one

Referring to fig. 1 to 6, a direct type backlight module with a stable structure provides a backlight source for a display device such as a liquid crystal display, which cannot emit light autonomously. The backlight module comprises a back plate 1, a light-emitting component 2, a supporting frame 3, a light scattering component 4 and a fixing frame 5.

Referring to fig. 1 and 4, the back plate 1 is a groove-shaped structure with side edges around, and is a supporting and mounting structure of the whole backlight module, the light emitting assembly 2, the supporting frame 3, the light scattering assembly 4 and the fixing frame 5 of the backlight module are all mounted on the back plate 1, the light emitting assembly 2, the supporting frame 3 and the light scattering assembly 4 are mounted in the groove on the back plate 1, and the fixing frame 5 is mounted on the front side of the back plate 1. The back plate 1 can generally adopt an injection molding plastic part, a punch forming metal part and the like, and the heat dissipation effect of the metal part is good, so that the service life of the light source in the backlight module can be prolonged, the back plate 1 preferably adopts the punch forming metal part, and the back plate 1 in the embodiment adopts the punch forming metal part.

Referring to fig. 1, the light emitting element 2 is a light emitting structure of the backlight module, and the light emitting function of the backlight module is realized by the light emitting element 2 emitting light. The light emitting module 2 generally uses a plurality of point light sources to emit light, and may use a conventional light source such as an LED lamp.

Referring to fig. 1 to 3, the supporting frame 3 is used for supporting and installing the light scattering assembly 4 in the back plate 1, so that the light scattering assembly 4 is not easy to shift in the backlight module and move down to the light emitting assembly 2 when the backlight module is used in an environment with equal vibration on an automobile, and the uniformity of light emission of the backlight module is not affected; the supporting frame 3 is arranged around the inner side of the back plate 1 and arranged outside the light emitting component 2. The supporting frame 3 can adopt common frame structures such as a metal frame, a rubber frame and the like; the mass of the rubber frame is small, and the weight of the backlight module can be reduced, so that the support frame 3 in the embodiment adopts the injection molding rubber frame. The size of the support frame 3 is consistent with the size of the groove in the back plate 1, so that the outer side wall of the support frame 3 can be just abutted against the inner side wall of the back plate 1 when the backlight module is installed, and the support frame 3 is stably installed in the back plate 1.

Referring to fig. 1, the light emitting device 2 is fixed at the bottom of the inner side of the back plate 1, the light emitting device 2 is generally a plurality of point light sources, and the light scattering device 4 processes the point light emitted from the light emitting device 2 into a uniform surface light source, so that the backlight module becomes a uniform surface light source. The light diffusion component 4 is supported on the supporting frame 3, and the light diffusion component 4 can adopt a combination of a diffusion plate, a light diffusion film, a brightness enhancement film and the like according to requirements.

Referring to fig. 1, the fixing frame 5 fixes the light scattering component 4 in the back plate 1, so as to prevent the light scattering component 4 from falling from the back plate 1 and affecting the visual effect of the backlight module. The fixing frame 5 is fixed on the backboard 1 and presses and fixes the supporting frame 3 and the light diffusion component 4 in the backboard 1. The fixing frame 5 and the backboard 1 can be fixed by a common connection method, such as bonding, clamping and the like. The fixing frame 5 can adopt a common frame-shaped structure such as a metal frame, a rubber frame and the like; in order to reduce the weight of the backlight module, the fixing frame 5 is preferably a plastic frame, and in the embodiment, the fixing frame 5 is an injection molded plastic frame.

Set up in backlight unit and set up carriage 3 and support diffuser plate in the backlight unit, the membrane that looses, the astigmatism subassembly 4 of constituteing such as membrane that adds lustre to, thereby the diffuser plate, astigmatism subassembly 4 of constituteing such as membrane that looses lustre to and add lustre to can not couch to the point light source on, and carriage 3 is around backlight unit is inboard, also can not produce the lamp shadow when backlight unit is luminous, the luminous homogeneity and the visual effect of backlight unit have been guaranteed, the light source that has also guaranteed backlight unit can not receive the pushing down of astigmatism subassembly 4 and damage. The light scattering component 4 formed by the diffusion plate, the light scattering film, the light intensifying film and the like is pressed and fixed on the back plate 1 through the fixing frame 5, the light scattering component 4 is further ensured not to fall onto a point light source of the backlight module, and therefore the light emitting uniformity of the backlight module and the light source of the backlight module are further ensured not to be damaged due to the fact that the light source of the backlight module is pressed down by the light scattering component 4.

Referring to fig. 1, 2 and 4, in order to better fix the light diffusion assembly 4 on the back plate 1 and prevent the light diffusion assembly 4 from shifting, falling down and other abnormalities when the backlight module is used in a vibrating environment, the top of the back plate 1 is provided with the positioning groove 11, the outer side of the light diffusion assembly 4 is provided with the first positioning protrusion 41, the first positioning protrusion 41 is matched with the positioning groove 11, that is, the first positioning protrusion 41 is consistent with the positioning groove 11 in position, size and shape, so that the first positioning protrusion 41 can be just installed in the positioning groove 11 to fix the light diffusion assembly 4 on the back plate 1. First locating convex block 41 and locating slot 11 can be set up on the relative both sides of rectangle backlight unit, and the four sides at rectangle backlight unit all set up preferably, and first locating convex block 41 all sets up with locating slot 11 on rectangle backlight unit's four sides in this embodiment for astigmatism subassembly 4 is more stable in the installation on backplate 1, thereby guarantees the stability that backlight unit used in unstable environment such as vibration.

Referring to fig. 1 to 4, in order to further improve the stability of the backlight module in unstable environments such as vibration, a second positioning protrusion 31 is disposed outside the supporting frame 3, the second positioning protrusion 31 is adapted to the positioning groove 11, that is, the position, size and shape of the second positioning protrusion 31 and the positioning groove 11 are consistent, so that the second positioning protrusion 31 is properly installed in the positioning groove 11, and the supporting frame 3 is fixed on the back plate 1. The first positioning protrusions 41 are overlapped on the second positioning protrusions 31, so that both the light dispersion member 4 and the support frame 3 can be stably fixed to the back plate 1. The second positioning bumps 31 and the positioning grooves 11 can be disposed on two opposite sides of the rectangular backlight module, preferably on four sides of the rectangular backlight module, and the second positioning bumps 31 and the positioning grooves 11 are disposed on four sides of the rectangular backlight module in this embodiment, so that the light scattering assembly 4 and the supporting frame 3 are more stably mounted on the back plate 1, and the stability of the backlight module in unstable environments such as vibration is further ensured.

Referring to fig. 1 to 4, in order to further improve the stability of the backlight module in unstable environments such as vibration, the backlight module further includes a fixing adhesive 6, and the fixing adhesive 6 bonds and fixes the first positioning protrusion 41 on the back plate 1, so that the light diffusion assembly 4 and the support frame 3 are fixed on the back plate 1 in three directions of X, Y and Z, and the light diffusion assembly 4 and the support frame 3 are stably fixed on the back plate 1. In addition, a double-sided adhesive tape is preferably arranged between the first positioning lug 41 and the second positioning lug 31, and the light diffusion component 4 and the support frame 3 are bonded and fixed together by bonding and fixing the first positioning lug 41 and the second positioning lug 31 together; meanwhile, if the light diffusion assembly has a plurality of layers, the first positioning protrusions 41 of the light diffusion film of the adjacent layer are preferably bonded together by a double-sided adhesive tape, so that the layers of the light diffusion assembly are bonded and fixed together and are bonded and fixed together with the support frame 3 to form a stable structure.

Referring to fig. 5 and 6, the light diffusion assembly 4 and the support frame 3 expand during temperature rise, and at this time, the first positioning protrusion 41 and the second positioning protrusion 31 may be extended to abut against the inner sidewall of the fixing frame 5, so that the light diffusion assembly 4 and the support frame 3 may deform, in order to avoid the light diffusion assembly 4 and the support frame 3 from deforming due to the temperature rise expansion and affecting the visual effect of the backlight module, the inner sidewall of the fixing frame 5 is provided with avoiding grooves 51, the avoiding grooves 51 are arranged at the outer sides of the first positioning protrusion 41 and the second positioning protrusion 31, the positions and the number of the avoiding grooves 51 are consistent with the positions and the number of the first positioning protrusion 41 and the second positioning protrusion 31, and the size of the avoiding grooves 51 is larger than the sizes of the first positioning protrusion 41 and the second positioning protrusion 31, so that the first positioning protrusion 41 and the second positioning protrusion 31 can be avoided by the avoiding grooves 51 during the temperature rise expansion of the light diffusion assembly 4 and the support frame 3, at this time, the first positioning protrusion 41 and the second positioning protrusion 31 will not collide with the inner sidewall of the fixing frame 5 even when they extend, and the light diffusion assembly 4 and the supporting frame 3 will not deform and affect the visual effect of the backlight module. In this embodiment, the avoiding grooves 51 are formed on the four inner sidewalls of the fixing frame 5 to avoid the first positioning protrusions 41 and the second positioning protrusions 31 around the light scattering assembly 4 and the supporting frame 3, respectively.

Referring to fig. 1 and 4, backlight unit's backplate 1 adopts stamping forming's metalwork in this embodiment, for the stamping forming of backplate 1 of convenience, 1 four corners of backplate all sets up breach 12, can make things convenient for 1 stamping forming of backplate through breach 12 to can avoid backplate 1 because expend with heat and contract with cold to produce the appearance and the luminous visual effect that warp and influence backlight unit.

Referring to fig. 4 to 6, in the embodiment, the fixed connection between the back plate 1 of the backlight module and the fixing frame 5 can adopt the following structure: the outside of backplate 1 is provided with fixed block 13, and fixed block 13 is through stamping forming. The fixing frame 5 is provided with a fixing hole 52 on the side wall, and the fixing hole 52 can be reserved when the fixing frame 5 is injection molded. The fixing block 13 is adapted to the fixing hole 52, that is, the fixing block 13 is identical to the fixing hole 52 in size and position, and the back plate 1 and the fixing frame 5 are fixed together by the fixing block 13 and the fixing hole 52 in a clamping manner when the backlight module is installed.

Referring to fig. 1 to 6, when the direct type backlight module of the present embodiment is installed, the light emitting assembly 2 and the supporting frame 3 are installed in the back plate 1, the supporting frame 3 is installed at the inner side of the back plate 1 and is abutted against the inner side wall of the back plate 1, and the light emitting assembly 2 is installed at the inner side of the supporting frame 3; then the light scattering component 4 is installed on the support frame 3, the light scattering component 4 and each first positioning lug 41 and each second positioning lug 31 of the support frame 3 are installed in each positioning groove 11 of the back plate 1, and the first positioning lug 41 on the uppermost layer is adhered and fixed on the back plate 1 through the fixing glue 6; finally, the fixing frame 5 is fixed on the back plate 1 by the fastening of the fixing block 13 and the fixing hole 52, thereby forming a complete direct type backlight module. When in use, the direct type backlight module is arranged on the back surface of the display screen which can not independently emit light, and provides backlight for the display screen.

Example two

Referring to fig. 1 to 8, the overall structure of the direct type backlight module with stable structure of the present embodiment is the same as that of the first embodiment, except that the present embodiment further optimizes and improves the light scattering assembly 4 to optimize the uniformity of light emission of the backlight module and improve the utilization rate of light emission of the backlight module.

Referring to fig. 1, 7 and 8, the light diffusion assembly 4 of the present embodiment includes a diffusion plate 42, a light diffusion film 43 and a light enhancement film 44, wherein the diffusion plate 42, the light diffusion film 43 and the light enhancement film 44 are sequentially stacked on the supporting frame 3 and are pressed and fixed in the back plate 1 by the fixing frame 5. The diffusion plate 42, the light-diffusing film 43 and the light-adding film 44 are provided with first positioning bumps 41 on the outer sides thereof, and are mounted on the back plate 1 through the first positioning bumps 41. The diffusion plate 42 plays a role of light diffusion, and meanwhile, the diffusion plate is of a plate-shaped structure with certain strength and can support the light diffusion film 43 and the light enhancement film 44; the diffuser plate 42 is preferably fixed to the support frame 3 by a double-sided adhesive tape 45, and the double-sided adhesive tape 45 is generally provided on opposite sides of the support frame 3. The light-diffusing film 43 further homogenizes the light emitted from the backlight module, so that the uniformity of the light emitted from the backlight module is better. The brightness enhancement film 44 reduces the light emitting angle of the backlight module, so that the backlight module emits light towards the front, and the backlight module emits more light to be utilized by the display screen in front, thereby improving the light emitting utilization rate of the backlight module. The number of the light diffusing films 43 and the light intensifying films 44 can be selected according to the visual effect and brightness requirement of the backlight module, and three light diffusing films 43 and two light intensifying films 44 are arranged in the embodiment.

Referring to fig. 1, in order to avoid the gap light leak between the light scattering component 4 and the fixed frame 5 to influence the visual effect of the backlight module when the backlight module emits light, the light shielding glue 7 is further arranged, the light shielding glue 7 is adhered to the top of the light intensifying film 44 and is adhered between the light intensifying film 44 and the fixed frame 5, so that the gap between the light scattering component 4 and the fixed frame 5 can be shielded through the light shielding glue 7, the gap light leak between the light scattering component 4 and the fixed frame 5 is avoided, and the uniformity of the backlight module emitting light is ensured. The shading glue 7 can adopt a strip structure, and is respectively attached to each side of the light scattering component 4; the light shielding glue 7 is preferably in a frame structure, so that the light shielding glue is attached to each edge of the backlight module at one time to shield the gap between the light scattering component 4 and the fixing frame 5 at each edge of the backlight module, and the backlight module is more convenient to assemble and has higher production efficiency. The light-shielding glue 7 is dark single-sided glue, preferably black single-sided glue with the best light shielding.

Referring to fig. 1 to 8, when the direct type backlight module of the present embodiment is installed, the light emitting assembly 2 and the supporting frame 3 are installed in the back plate 1, the supporting frame 3 is installed at the inner side of the back plate 1 and is abutted against the inner side wall of the back plate 1, and the light emitting assembly 2 is installed at the inner side of the supporting frame 3; then, three layers of light scattering films 43 and two side light adding films 44 of the light scattering assembly 4 are sequentially overlapped on the support frame 3, the light scattering assembly 4 and each first positioning bump 41 and each second positioning bump 31 of the support frame 3 are arranged in each positioning groove 11 of the back plate 1, and the first positioning bump 41 on the uppermost layer is adhered and fixed on the back plate 1 through the fixing glue 6; finally, the fixing frame 5 is fixed on the back plate 1 by the fastening of the fixing block 13 and the fixing hole 52, and the light shielding glue 7 is attached between the brightness enhancement film 44 and the fixing frame 5, thereby forming a complete direct type backlight module. When in use, the direct type backlight module is arranged on the back surface of the display screen which can not independently emit light, and provides backlight for the display screen.

EXAMPLE III

Referring to fig. 1 to 10, the overall structure of the direct type backlight module with stable structure of the present embodiment is the same as that of the second embodiment, except that the present embodiment further optimizes and improves the light emitting element 2 to improve the utilization rate of the light emitted by the light source 227 on the light emitting element 2, and the difference between the third embodiment and the second embodiment will be described below, and the same point refers to the second embodiment.

Referring to fig. 9 and 10, the light emitting assembly 2 includes a heat conductive double-sided adhesive tape 21, a lamp panel 22 and a reflective film 23, the heat conductive double-sided adhesive tape 21 is an adhesive tape, and the lamp panel 22 is adhered and fixed at the bottom of the inner side of the back plate 1 through the heat conductive double-sided adhesive tape 21, so that the lamp panel 22 can be adhered and fixed in the back plate 1; the heat-conducting double-sided adhesive tape 21 is also a hot conductor, and the heat-conducting double-sided adhesive tape 21 can also conduct the heat emitted by the light source 227 on the lamp panel 22 to the backboard 1 and then radiate the heat through the backboard 1. The lamp panel 22 is a structure formed by welding a plurality of light sources 227 on a PCB, and generally, an LED lamp is used as the light source 227, and the LED lamp is soldered in a circuit of the PCB by soldering. The reflective film 23 is a reflective structure, so that more light emitted by the light source 227 on the lamp panel 22 can be reflected to the front side of the backlight module, and the utilization rate of light emitted by the light source 227 on the light emitting module 2 is improved; the reflective film 23 is adhered and fixed on the PCB of the lamp panel 22, the reflective film 23 is provided with an opening with the same size as the light source 227, and the light source on the lamp panel 22 is exposed from the opening of the reflective film 23.

Referring to fig. 1, 9 and 10, a through hole 14 is formed in the bottom of the back plate 1, and the connector 221 of the lamp panel 22 penetrates out of the through hole 14 to the outside of the backlight module after the backlight module is assembled, so that the connector is conveniently connected with a circuit outside the backlight module. The connector 221 is plugged with an FPC cable 222, and the circuit of the lamp panel 22 is connected to an external power source through the FPC cable 222. The FPC scratch-resistant glue 223 is arranged to protect the FPC winding displacement 222, and the FPC fixing glue 224 is arranged to bond and fix the FPC winding displacement 222 on the back surface of the back plate 1; label paper 225 is arranged on the back of the back plate 1 to mark information of the backlight module, and a back adhesive 226 is arranged on the back of the back plate 1 for standby.

Referring to fig. 1 to 10, when the direct type backlight module of the present embodiment is installed, the light emitting assembly 2 and the supporting frame 3 are installed in the back plate 1, the supporting frame 3 is installed at the inner side of the back plate 1 and is abutted against the inner side wall of the back plate 1, the light emitting assembly 2 is installed at the inner side of the supporting frame 3, the lamp panel 22 of the light emitting assembly 2 is adhered and fixed at the bottom of the inner side of the back plate 1 through the heat conducting double faced adhesive tape 21, the connector 221 of the lamp panel 22 extends out of the back plate 1 from the through hole 14 and is inserted into the FPC flat cable 222, the FPC scratch-proof adhesive 223 and the FPC fixing adhesive 224 are attached after the FPC flat cable 222 is inserted, and in addition, the label paper 225 and the standby adhesive 226 are attached to the back surface of the back plate 1; then, three layers of light scattering films 43 and two side light adding films 44 of the light scattering assembly 4 are sequentially overlapped on the support frame 3, the light scattering assembly 4 and each first positioning bump 41 and each second positioning bump 31 of the support frame 3 are arranged in each positioning groove 11 of the back plate 1, and the first positioning bump 41 on the uppermost layer is adhered and fixed on the back plate 1 through the fixing glue 6; finally, the fixing frame 5 is fixed on the back plate 1 by the fastening of the fixing block 13 and the fixing hole 52, and the light shielding glue 7 is attached between the brightness enhancement film 44 and the fixing frame 5, thereby forming a complete direct type backlight module. When in use, the direct type backlight module is arranged on the back surface of the display screen which can not independently emit light to provide backlight for the display screen.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not limitations to the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. This need not be, nor should it be exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. The utility model provides a stable in structure's straight following formula backlight unit which characterized in that: the LED backlight module comprises a back plate (1), a light-emitting component (2), a supporting frame (3), a light scattering component (4) and a fixing frame (5), wherein the light-emitting component (2) is fixed at the bottom of the inner side of the back plate (1); the supporting frame (3) is arranged on the periphery of the inner side of the back plate (1) and is arranged on the outer side of the light-emitting component (2); the light scattering component (4) is supported on the supporting frame (3); the fixing frame (5) is fixed on the back plate (1) and presses and fixes the supporting frame (3) and the light scattering assembly (4) in the back plate (1).

2. The direct type backlight module with stable structure as claimed in claim 1, wherein: the top of the back plate (1) is provided with a positioning groove (11), the outer side of the light scattering assembly (4) is provided with a first positioning lug (41), the first positioning lug (41) is matched with the positioning groove (11), and the first positioning lug (41) is installed in the positioning groove (11).

3. The direct type backlight module with stable structure as claimed in claim 2, wherein: the utility model discloses a support frame, including support frame (3), locating groove (11), locating groove (31), first locating lug (41) are installed in the locating groove (11), the support frame (3) outside is provided with second locating lug (31), second locating lug (31) and locating groove (11) looks adaptation, second locating lug (31) are installed in locating groove (11), first locating lug (41) are folded and are established on second locating lug (31).

4. The direct type backlight module with stable structure as claimed in claim 3, wherein: the fixing device further comprises fixing glue (6), and the first positioning lug (41) is fixedly adhered to the back plate (1) through the fixing glue (6).

5. The structurally stable direct type backlight module as set forth in claim 4, wherein: be provided with on the fixed frame (5) inside wall and dodge groove (51), dodge groove (51) and set up in first location lug (41) and second location lug (31) outside, dodge groove (51) and can dodge first location lug (41) and second location lug (31).

6. The direct type backlight module with stable structure as claimed in claim 5, wherein: the four corners of the back plate (1) are provided with notches (12), and the notches (12) facilitate punch forming of the back plate (1).

7. The direct type backlight module with stable structure as claimed in claim 6, wherein: backplate (1) outside is provided with fixed block (13), be provided with fixed orifices (52) on fixed frame (5) lateral wall, fixed block (13) and fixed orifices (52) looks adaptation, backplate (1) is together fixed with fixed frame (5) block through fixed block (13) and fixed orifices (52).

8. The direct type backlight module with stable structure as claimed in any one of claims 1 to 7, wherein: the light scattering assembly (4) comprises a diffusion plate (42), a light scattering film (43) and a light intensifying film (44), wherein the diffusion plate (42), the light scattering film (43) and the light intensifying film (44) are sequentially stacked on the supporting frame (3) and are fixedly pressed in the back plate (1) through the fixing frame (5); and first positioning convex blocks (41) are arranged on the outer sides of the diffusion plate (42), the light-diffusing film (43) and the light-intensifying film (44).

9. The direct type backlight module with stable structure as claimed in claim 8, wherein: the light shading film is characterized by further comprising light shading glue (7), wherein the light shading glue (7) is adhered to the top of the light intensifying film (44) and is adhered between the light intensifying film (44) and the fixing frame (5).

10. The structurally stable direct type backlight module as set forth in claim 9, wherein: light emitting component (2) are including heat conduction double faced adhesive tape (21), lamp plate (22) and reflective membrane (23), lamp plate (22) are fixed in backplate (1) inboard bottom through heat conduction double faced adhesive tape (21) bonding, reflective membrane (23) are fixed on lamp plate (22), expose on light source from reflective membrane (23) on lamp plate (22).

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